/**
 * Copyright 2013 David Rusek <dave dot rusek at gmail dot com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.robotninjas.barge.log;

import com.google.common.base.Objects;
import com.google.common.collect.Lists;

import javax.annotation.Nonnull;
import javax.annotation.concurrent.Immutable;
import javax.annotation.concurrent.ThreadSafe;
import java.util.Collections;
import java.util.List;

import static org.robotninjas.barge.proto.RaftEntry.Entry;

@Immutable
@ThreadSafe
public class GetEntriesResult {

    private final long prevEntryTerm;
    private final long prevEntryIndex;
    private final List<Entry> entries;

    public GetEntriesResult(long prevEntryTerm, long prevEntryIndex, List<Entry> entries) {
        this.prevEntryTerm = prevEntryTerm;
        this.prevEntryIndex = prevEntryIndex;
        this.entries = Lists.newArrayList(entries);
    }

    public long lastLogTerm() {
        return prevEntryTerm;
    }

    public long lastLogIndex() {
        return prevEntryIndex;
    }

    @Nonnull
    public List<Entry> entries() {
        return Collections.unmodifiableList(entries);
    }

    @Override
    public String toString() {
        return Objects.toStringHelper(getClass()).add("prevEntryIndex", prevEntryIndex).add("prevEntryTerm", prevEntryTerm).add("numEntries", entries.size()).toString();
    }
}
